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Slurry walls are used in various construction and engineering applications where the creation of a deep, watertight, and structurally stable barrier is necessary, for example in tunnel construction to stabilize the surrounding soil and prevent water ingress during tunnel excavation.
Slurry walls are typically constructed by starting with a set of guide walls, typically 1 metre (3 ft 3 in) deep and 0.5 metres (1 ft 8 in) thick. The guide walls are constructed on the ground surface to outline the desired slurry trench and guide the excavation machinery. Excavation is done using a special clamshell-shaped digger or a hydromill trench cutter, suspended from a crane.
Once a particular length of trench is reached, a reinforcing cage is lowered into the slurry-filled pit and the pit is filled with concrete from the bottom up using tremie pipes. The heavier concrete displaces the bentonite slurry, which is pumped out, filtered, and stored in tanks for use in the next wall segment, or recycled.
- Contractor
- Biergans Pumpen-Vertrieb
- Tsurumi support
- Pump selection and technical advice.